Optical concentrators for Čerenkov light detector (2009)
RICH1 (Ring Imaging Cherenkov) detector is an important part of COMPASS particle physics experiment in CERN. Its central area photon detection part is being upgraded from wire chambers with CsI...
First Experience with the LHC Beam Loss Monitoring System (2009)
Böhlen, T, Dehning, B, Effinger, E, Emery, J, Follin, F, Holzer, E, ...
The LHC beam loss monitoring system (BLM) consists of about 4000 monitors observing losses at all quadrupole magnets and many other likely loss locations. At the first LHC operation in August and...
Design and Implementation of a Detector for High Flux Mixed Radiation Fields (2008)
Kramer, Daniel, Dehning, Bernd, Sulc, Miroslav
The main purpose of the LHC Beam Loss Monitoring (BLM) system is the active protection of the LHC accelerators' elements against the quench of superconducting magnets and the damage of equipment...
Generation of 1.5 Million Beam Loss Threshold Values (2008)
Holzer, E B, Bocian, D, Böhlen, T T, Dehning, B, Kramer, Daniel, Ponce, L, ...
CERN's Large Hadron Collider will store an unprecedented amount of energy in its circulating beams. Beamloss monitoring (BLM) is, therefore, critical for machine protection. It must protect against...
Development, Production and Testing of 4500 Beam Loss Monitors (2008)
Holzer, E B, Chiggiato, P, Dehning, B, Ferioli, G, Grishin, V, Jimenez, T M, ...
Beam-loss monitoring (BLM) [1] is a key element in the LHC machine protection. 4250 nitrogen filled ionization chambers (IC) and 350 secondary emission monitors (SEM) have been manufactured and...
Koschik, A, Goddard, B, Höfle, Wolfgang, Kotzian, G, Kramer, Daniel, Kramer, T
The critical and delicate process of dumping the beams of the LHC requires very low particle densities within the $3 \mu$s of the dump kicker rising edge. High beam population in this so-called...
Beam Scraping to detect and remove Halo in LHC Injection (2008)
Letnes, P A, Pedersen, S, Brielmann, A, Burkhardt, H, Kramer, Daniel
Fast scrapers are installed in the SPS to detect and remove beam halo before extraction of beams to the LHC, to minimize the probability for quenching of superconducting magnets in the LHC. We...
LHC Beam Loss Detector Design: Simulations and Measurements (2007)
Dehning, B, Effinger, E, Emery, J, Ferioli, G, Holzer, E B, Kramer, Daniel, ...
The Beam Loss Monitoring (BLM) system is integrated in the active equipment protection system of the LHC. It determines the number of particles lost from the primary hadron beam by measuring the...
The LHC Beam Loss Measurement System (2007)
Dehning, B, Effinger, E, Emery, J, Ferioli, G, Guaglio, G, Holzer, E B, ...
An unprecedented amount of energy will be stored in the circulating beams of LHC. The loss of even a very small fraction of a beam may induce a quench in the superconducting magnets or cause physical...
Beam Scraping for LHC Injection (2007)
Burkhardt, H, Arduini, Gianluigi, Fischer, C, Gras, J-J, Koschik, A, Kramer, Daniel, ...
Operation of the LHC will require injection of very high intensity beams from the SPS to the LHC. Fast scrapers have been installed and will be used in the SPS to detect and remove any existing halo...
Classification of the LHC BLM Ionization Chamber (2007)
Stockner, M, Dehning, B, Fabjan, Christian Wolfgang, Holzer, E B, Kramer, Daniel
The LHC beam loss monitoring (BLM) system must prevent the super conducting magnets from quenching and protect the machine components from damage. The main monitor type is an ionization chamber....
Secondary Electron Emission Beam Loss Monitor for LHC (2007)
Dehning, B, Ferioli, G, Holzer, EB, Kramer, Daniel
Beam Loss Monitoring (BLM) system is a vital part of the active protection of the LHC accelerators' elements. It should provide the number of particles lost from the primary hadron beam by measuring...
The COMPASS Experiment at CERN (2007)
Abbon, P, Albrecht, E, Alexakhin, V Yu, Alexandrov, Yu, Alexeev, G D, Alekseev, M G, ...
The COMPASS experiment makes use of the CERN SPS high-intensitymuon and hadron beams for the investigation of the nucleon spin structure and the spectroscopy of hadrons. One or more outgoing...
Fast photon detection for the COMPASS RICH detector (2006)
Schill, C, Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Birsa, R, ...
The COMPASS experiment at the SPS accelerator at CERN uses a large scale Ring Imaging CHerenkov detector (RICH) to identify pions, kaons and protons in a wide momentum range. For the data taking in...
Ageev, E S, Alexakhin, V Yu, Alexandrov, Yu A, Alexeev, G D, Alexeev, M, Amoroso, A, ...
New high precision measurements of the Collins and Sivers asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarised 6LiD target are presented. The data...
Fast Photon Detection for Particle Identification with COMPASS RICH-1 (2006)
Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Birsa, R, Bordalo, P, ...
Particle identification at high rates is an important challenge for many current and future high-energy physics experiments. The upgrade of the COMPASS RICH-1 detector requires a new technique for...
The Deuteron Spin-dependent Structure Function $g^{d}_1$ and its First Moment (2006)
Alexakhin, V Yu, Alexandrov, Yu A, Alexeev, G D, Alexeev, M, Amoroso, A, Badeek, B, ...
We present a measurement of the deuteron spin-dependent structure function g^d_1 based on the data collected by the COMPASS experiment at CERN during the years 2002-2004. The data provide an accurate...
Beam Loss Monitoring System for the LHC (2006)
Holzer, E B, Dehning, B, Effinger, E, Emery, J, Ferioli, G, González, J L, ...
One of the most critical elements for the protection of CERN's Large Hadron Collider (LHC) is its beam loss monitoring (BLM) system. It must prevent the superconducting magnets from quenching and...
Optical design for BIPM imaging system (2005)
Dehning, B, Fischer, C, Hutchins, S, Koopman, J, Kramer, Daniel
The light imaging system for the Beam Ionization Profile Monitor (BIPM) was designed to allow simultaneous operation of a fast Multi Anode Photo Multiplier and two new types of intensified standard...
Accuracy of Profile Monitors and LHC Emittance Measurements (2004)
Arduini, Gianluigi, Dehning, Bernd, Ferioli, G, Koopman, J, Kramer, Daniel, Roncarolo, F
The monitoring and controlling of the beam transverse emittance is essential to allow high luminosity performances in a collider operation. The profile monitors in the LHC injection chain are...
Fischer, C, Dehning, Bernd, Koopman, J, Kramer, Daniel, Roncarolo, F
During the past two years, a new Ionization Profile Monitor was installed and tested in the CERN SPS. In parallel modifications were made on various wire scanner monitors. The aim is to develop...
Fischer, C, Koopman, J, Kramer, Daniel, Perret, R, Sillanoli, M
Based on the encouraging results obtained with a Rest Gas Ionization Profile Monitor of a first generation, a new monitor was designed and then installed in the SPS at the beginning of 2002. Its...
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